Oth degenerative diseases of nervous system, NEC (G31)

• ICD-10 Index

  • Diseases of the nervous system (G00–G99)

    • Other degenerative diseases of the nervous system (G30-G32)

      • Oth degenerative diseases of nervous system, NEC (G31)

        • G31 - Oth degenerative diseases of nervous system, NEC NON-BILLABLE CODE
        • G31.0 - Frontotemporal dementia NON-BILLABLE CODE
        • G31.01 - Pick's disease BILLABLE CODE
        • G31.09 - Other frontotemporal neurocognitive disorder BILLABLE CODE UPDATED CODE
        • G31.1 - Senile degeneration of brain, not elsewhere classified BILLABLE CODE
        • G31.2 - Degeneration of nervous system due to alcohol BILLABLE CODE
        • G31.8 - Other specified degenerative diseases of nervous system NON-BILLABLE CODE
        • G31.81 - Alpers disease BILLABLE CODE
        • G31.82 - Leigh's disease BILLABLE CODE
        • G31.83 - Neurocognitive disorder with Lewy bodies BILLABLE CODE UPDATED CODE
        • G31.84 - Mild cognitive impairment of uncertain or unknown etiology BILLABLE CODE UPDATED CODE
        • G31.85 - Corticobasal degeneration BILLABLE CODE
        • G31.89 - Other specified degenerative diseases of nervous system BILLABLE CODE
        • G31.9 - Degenerative disease of nervous system, unspecified BILLABLE CODE

Clinical Information for Oth degenerative diseases of nervous system, NEC (G31)

Frontotemporal Dementia - The most common clinical form of FRONTOTEMPORAL LOBAR DEGENERATION, this dementia presents with personality and behavioral changes often associated with disinhibition, apathy, and lack of insight.

Corticobasal Degeneration - Rare progressive neurological disorder characterized by Parkinsonism, cortical atrophy of multiple areas of the brain including the cerebral cortex and the basal ganglia, cognitive dysfunction and eye movement abnormalities.

Frontotemporal Dementia - The most common clinical form of FRONTOTEMPORAL LOBAR DEGENERATION, this dementia presents with personality and behavioral changes often associated with disinhibition, apathy, and lack of insight.

Frontotemporal Dementia - The most common clinical form of FRONTOTEMPORAL LOBAR DEGENERATION, this dementia presents with personality and behavioral changes often associated with disinhibition, apathy, and lack of insight.

Frontotemporal Lobar Degeneration - Heterogeneous group of neurodegenerative disorders characterized by frontal and temporal lobe atrophy associated with neuronal loss, gliosis, and dementia. Patients exhibit progressive changes in social, behavioral, and/or language function. Multiple subtypes or forms are recognized based on presence or absence of TAU PROTEIN inclusions. FTLD includes three clinical syndromes: FRONTOTEMPORAL DEMENTIA, semantic dementia, and PRIMARY PROGRESSIVE NONFLUENT APHASIA.

Frontotemporal Lobar Degeneration - Heterogeneous group of neurodegenerative disorders characterized by frontal and temporal lobe atrophy associated with neuronal loss, gliosis, and dementia. Patients exhibit progressive changes in social, behavioral, and/or language function. Multiple subtypes or forms are recognized based on presence or absence of TAU PROTEIN inclusions. FTLD includes three clinical syndromes: FRONTOTEMPORAL DEMENTIA, semantic dementia, and PRIMARY PROGRESSIVE NONFLUENT APHASIA.

Frontotemporal Lobar Degeneration - Heterogeneous group of neurodegenerative disorders characterized by frontal and temporal lobe atrophy associated with neuronal loss, gliosis, and dementia. Patients exhibit progressive changes in social, behavioral, and/or language function. Multiple subtypes or forms are recognized based on presence or absence of TAU PROTEIN inclusions. FTLD includes three clinical syndromes: FRONTOTEMPORAL DEMENTIA, semantic dementia, and PRIMARY PROGRESSIVE NONFLUENT APHASIA.

Instructional Notations

Use Additional Code Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

• For codes G31.0 G31.83 G31.85 G31.9
• dementia with anxiety F02.84 F02.A4 F02.B4 F02.C4
• dementia with behavioral disturbance F02.81 F02.A1 F02.B1 F02.C1
• dementia with mood disturbance F02.83 F02.A3 F02.B3 F02.C3
• dementia with psychotic disturbance F02.82 F02.A2 F02.B2 F02.C2
• dementia without behavioral disturbance F02.80 F02.A0 F02.B0 F02.C0
• mild neurocognitive disorder due to known physiological condition F06.7

Type 2 Excludes Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

• Reye's syndrome G93.7